Exhaust gas return device for internal combustion engines



Oct. 14, 1941. J. MARX ETAL EXHAUST GAS RETURN DEVICE FORVINTERNAL COMBUSTION ENGINES Filed April 2'7, 1939 Patented Oct. 14, 1941 4flJllrrso STATES, PATENT '-aofrFl-ca Joseph Marx'and Harr y P. siegle, cincinnati,

Ohio v Application April 27, 1939, serial No. 270,368 p 2 Claims.

This invention relates to an attachment for internal combustion engines for supplying a mixture of vaporized oil and gas to the cylinders, whereby not only an explosive mixture is provided but this mixture is utilized to transfer needed lubricant to the motor parts.

Generally the present apparatus provides a chamber having-a coiled tube contained therein, one end of the coil being connected to the exhaust manifold and the other end open for the discharge of the exhaust gas therein, together with means for supplying a mixture of oil and gas to the chamber, and feeding same when vaporized into the cylinders to promote combustion and insure lubrication.

One of the main objects is to construct an apparatus which will supply a continuous and proportionately regulated amount of lubricant to the motor in accordance with its essential requirements as determined by the motor speed.

Another object of the invention is to include in the lubrication a fuel feeding system which will function not only as the lubricant transfer agent but will improve the motor running due to the fuel treatment in transit and thereby provide a better performance with less fuel consumption.

Other features will more clearly hereinafter appear by reference to the accompanying specification and drawing, the latter being a side ele- Vation of the assembly with parts in section.

Referring now to the drawing it Will be noted that onlya fragmentary disclosure of the essential parts of an internal combustion engine are illustrated, these parts including the intake I, fuel feed connection 2, and carburetor mixing chamber 3, connected thereto by flanged bolted connection 4 in the usual manner. The carburetor may be of, any conventional up-draft or down-draft type essential to supply the usual charge to the cylinders through the manifold I and for this reason only that portion essential to a proper explanation is included in the drawing. For purposes of illustration the air intake 5 is shown but the iioat chamber, jet, venturi, and other essential parts of standard equipment, are omitted. As a part of this invention a supply tank 6 is connected by pipe 'I to the mixing chamber 3 at a point substantially diametrically opposite the air intake 5. While this location is perhaps preferable, the connection might be made at other points in the assembly, provided the mixture of oil and gasoline from the tank can be sucked or forced into the system for the at the extremities of the pipe 'I are yof standard packed form to eliminate leakage and permit removal and adjustment.

A chamber 8, having removable ends or ycaps 9 and ID is shown supported by bracket II on the intake manifold I. The bracket II is positioned substantially midway of the chamber body inasmuch as the extremities of this chamber are supported in part by the tubular connections I2 and i4 between the same and the intake manifold. The connection I2 is of U-form, the upper end extending into or through the removable end or cap 9 and the lower end communicates with and is connected to the L-connection I5, the free end of which is tapped into the intake manifold as shown. The other connection I4 is, in the illustration, in the nature of a short length of tube, threaded at its lower end into the intake manifold, and extending vertically from this connection through and into the chamber 8. A packing I6 completes this connection and provides a packed adjustable connection between the tube I4 and the chamber 8.

Within the chamber 8 is the coiled tube I1, the inner end I8 of which is open and located approximately immediately above the open upper end of the tubular connection I4. The open end I8 of the coil I'I and the tube I4 are thus in direct open relation for essential communication. The outer end of the tube extends through the end or cap 9 of the chamber 8 and is packed by gland nut I9 to permit packing, adjustment and removal, yand terminates in a connection with the exhaust manifold 20 as at 2|, whereby the exhaust gases can flow therethrough and into the chamber 8. V

The connections between the intake manifold and engine cylinders are indicated at 22 while the connection between the exhaust manifold 20 and the cylinders is shown at 2'3.

In the operation of the device, the gasoline and oil, preferably in the proportion of five (5) gallons of gasoline to two and a half (2l/2) gallons of oil, is supplied from the tank 6 through the pipe 1 to the mixing chamber 3. Presuming the engine to be dead, the actuation of the starter causes the proper charge of the mixture to enter the mixing chamber. The mixture consists of air entering the carburetor air inlet 5, gasoline from the usual jet (not shown) and the mixed gasoline and lubricating oil from tank E. This mixture is drawn into the manifold I by the suction created by the reciprocating pistons and thence is drawn into the engine cylinders. The

purpose hereinafter indicated. The connections exhaust gases enter chamber 8 through coiled tube I 'I since the gases are above atmospheric pressure and the chamber 8 is below atmospheric pressure since it is connected to the intake manifold by passages I2 and I4. The exhaust gases flow from exhaust manifold 2 through coiled pipe I1 into chamber 8 and through both passages I2 and I4 simultaneously into intake m-anifold I and thence into the engine cylinders.

What we claim as new and useful and desire to secure by Letters Patent is:

1. In a device for treating portions of the fuel charge in an intake manifold, the combination with an internal combustion engine, an intake manifold, an exhaust manifold, an elongated chamber, conduits connecting the end portions of said chamber with spaced portions of said intake manifold, a conduit connecting the exhaust manifold With one end portion of said chamber, and a spiral tube arranged in said chamber, one end of said tube being connected to and communicating with said exhaust connection, and the other end of said tube terminating adjacent to and coaxial with the adjacent end of an intake conduit connection.

2. In a device for treating portions of the fuel charge in an intake manifold, the combination with an internal combustion engine, an intake manifold, an exhaust manifold, an elongated chamber, conduits connecting the end portions of said chamber with end portions of said intake manifold, a conduit connecting the exhaust manifold with one end portion of said chamber, an elongated tube in said chamber, said tube being in communication at one end with said exhaust conduit the other end of said tube terminating adjacent one of said intake conduits and opening in a direction to discharge into same.

JOSEPH MARX. HARRY P. SIEGLER. 

